Environmental Matters (tables)

3 Months Ended

Mar. 31, 2013

Environmental Remediation Obligations [Abstract]

Schedule of Environmental Loss Contingencies by Site [Table Text Block]

	Current Liabilities						Non-Current Liabilities
	March 31,				December 31,		March 31,				December 31,
In thousands	2013		2012		2012		2013		2012		2012
Portland Harbor site:
Gasco/Siltronic Sediments	$	389	$	2,459	$	2,207	$	38,050	$	43,655	$	36,087
Other Portland Harbor	1,678		1,400		1,767		2,793		3,547		3,160
Gasco Uplands site	15,411		13,197		18,722		8,365		7,689		5,028
Siltronic Uplands site	556		478		637		414		588		379
Central Service Center site	80		—		140		386		424		396
Front Street site	760		1,131		993		199		395		—
Oregon Steel Mills	—		—		—		179		116		185
Total	$	18,874	$	18,665	$	24,466	$	50,386	$	56,414	$	45,235

Environmental Regulatory Table [Table Text Block]

	March 31,				December 31,
In thousands	2013		2012		2012
Cash paid	$	75,620	$	58,989	$	71,124
Total regulatory asset deferral(1)	125,671		108,007		121,144

⁽¹⁾ Total regulatory asset deferral includes cash paid, remaining liability, interest, and insurance reimbursement.